I have tried using the yeelight app on my iPhone to connect my colour bulb . When I first used the app it connected Ok and I was able to control the bulb. It also appeared on the DHCP list on my router. Using the app I saw that a firmware update was available so set it downloading. It appeared to finish but in the app I could no longer see the bulb.

I reset the bulb (on and off 5 times) and tried to connect again but got to 25% then got to the page with a big red X appears. I also tried the MiHome app and I was able to connect to the wifi and it loaded to 100% but then goes back to the reset page. This process is stuck in a continuous loop. The bulb also no longer appears in the DHCP list on the router.

I have been stuck with this problem for a few weeks now.

Can you please assist me at connecting my yeelight? I am using the Singapore server in the Yeelight app and my account id is 1726106272

I have been able to connect to and control the bulb by setting up a personal hotspot on my iPhone (linked to my home wifi) and then connecting my iPad to that phone's hotspot (instead of direct to home wifi). When I use the yeelight app on the iPad it completes the setup and lets me control the bulb.

However as this is using the hotspot from the phone it is no good for remote access/IFTTT.

I'm not sure why using the hotspot works as it is just connected to my home wifi.

The device-to-cloud traffic through hotspot and your router is different. Could you try this:1. Disable your router, setup your hotspot, use the same ssid and password as your router.2. Connect your bulb to this hotspot.3. Close this hotspot and enable your router.4. Check if the bulb shows in your router's DHCP client list.

I've tried rebooting the router again a few times but the bulb still just remains offline in the app.

In the router logs I noticed it still loses the lease after 2 mins. There's also a lot of post forwarding requests being made but closed around the time of the lease request. Does the bulb require any ports to be made open on the router to allow it to connect?

Any ideas anyone? This does seem to be a common issue looking at other posts but so far not seen anything that works

This looks like a DHCP compatibility issue, since your router is very uncommon so we won't be able to capture the traffic and do analysis.Do you know wireshark? Maybe you could help us capture some packets so we can do some investigation.

While I wait to see if the info I posted from Wireshark is any help identifying the problem, I noticed in other posts that it was suggested to post the results of pinging ot.io.mi.com and sg.ot.io.mi.com - I get:

The wireshark file you provided is not helping, we can't parse it since it's not in pcap format.I went through your posts again and I highly suspect it's the compatibility issue of DHCP. Could you post your DHCP settings page of your router here?

@weiwei I'll have another look at doing a wireshark capture and getting the information in pcap format.

I know other people with the same router and ISP as myself who use the bulbs without any problems.

Is it possible to change the firmware back to the earlier version that my bulb shipped with? The bulb connected fine first time but then did the firmware update and hasn't connected to my wifi since. Could it be a problem with the firmware?